Electric testing apparatus.



J. H. GONLON. ELECTRIC TESTING APPARATUS APPLICATION FILED MAY14, 1913 Patented June 16, 1914-.

2 SHEETS-SHEET 1.

IFJVENTUB WITNESSES.

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A TTORHEI J. H. GONLON.

ELECTRIC TESTING APPARATUS.

APPLICATION FILED MAY 14, 1913.

Patented June 16, 191 i 2 $HEBTS-SHEET 2.

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JAMES H. CONLON, O33 UNION, OREGON.

ELECTRIC TESTING APPARATUS.

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Specification. of Letters Patent.

Patented June 16, 1914.

Application filed May 14, 1913. Serial 110,767,598.

tor numerous other purposes the inrcntnm consists in a novel combination and arrangement of parts to be hereinalter described and claimed rctcrencc being bad to the acconuianying drawings in \vhich Figure l is a perspective view of the ap paratus. Fig. 2 is a similar view of a receiver used in connection with the apparatus. Fig. 3 is a central longitudinal sectional view of the apparatus. Fig. 4 is a diagrammatic view showing the circuits.

llet'erring specific lly to the drawings, denotes a portable casing in which is n1ount Ml an ordinary dry battery 11 for furnishing the current used in the operation of the a paratus.' The use is cylindrical in form and may he made of Wood, fiber or other insulating niaterza that it can be conveniently carried. a handle 12 for this purpose being provided.

in the outer surface of the casing is a longitudinal groove in' which is rigidly mounted a channeled metal strip 13 conn cted by Wire 14. to one of the battery terminals 1.5. In the channel of the strip 13 is mounted a slide 16 carrying a contact spring 17 and a binding screw 18. Ad

jacent to one end of the strip 13, and spaced therefrom, a n'zetal contact plate 19 is cmbedded in the casing 10, said plate carrying a binding post 20 provided with a lock nut 21.

in one end of the casing 10 is mounted a humor or similar electrical audible signal device l'uiving one of its tQIlTIlHlllS conc oy a Wire 23 to the second battery terminal 124-. The other terminal of the htmaer is connected by a ire to :1 sp r1 8?" in the licld coils of gei'lerators or l. and it of such a size scribed.

ack switch 26 mounted in the casing and connected by a wire 27 to the. contact plate 19. it plug 28 insertible from the outside .ot a casing controls thisswitch. This plot: is removable so that there may be inserted a plug 29 carrying a receiver 30 provided with a suitable head gear 31. Thus the receiver may be introduced into the battery circuit for a purpose to be hereinafter de- The ap jlaratus is used as follows: For testing: fuses, the plug 28 is inserted, and the sliding contact 17 is adjusted to correspond to the length of the fuse. The lineman can now quickly test all the fuses on a heavily laden junction pole by simply bringing the contacts 17 and 1.) against the terminals of each fuse in succession. It the fuse is good.

the battery circuit is closed-thereby and the humor 22 will be sounded. If the fuse is broken or burned out. no sound will he heard, so that the lineman Will at once know that a new fuse is required. The slide 16 enables adjustment to be made to adapt the apparatus to any size or style of fuse.

The apparatus can also be used in. testing For open circuits in the field coils of generators or n1otors,and primary or secondary coils ot transformers, or in testing for grounds bctiveen'the coil and the generator frame, or coil and transformer. case, by touching the contacts 17 and 19 to the coil and the iron case or frame respectively. In case the distance is too great to be reached by the contacts. \vires can be fastened to the contacts by means of the screw 18 and the binding post 520, and extend out any desired length in order to nudge the connection.

For testing incandescent lamps, the plug 28 is withdrawn and the receiver 30 is placed in the battery circuit by inserting the plug 29. The lamp-is placed pcrpcndicuhn', with the tip of the lamp base resting on the contact l9, and the contact 17 engaging the outside of the lamp base. the slide 16 being adjusted so that a proper contact is made. It the lamp is in good order, a click will in stantly be heard in the receiver 30, but it the filament is broken or burned out, no sound will be heard.

induction coils that have too niuch resistance to sound the humor 22 may also be tested with the receiver, and no 'matter how large the coil, or how many turns of very line will. ait, wrapped on it. a click will instantly be heard in the receiver 30 when the terminals are touched, but if the coil shohldbe burned out, or be broken some place in the winding, then no sound will be heard,

. arid the operator knows at once that the coil needs rewinding, or that a new one must be substituted. Both primary and secondary windings can be tested in this way.

The apparatus can be used to a good advantage in testing for grounds between tele-' phone pairs and the lead sheath inclosing the same, by touching one. contact to the pair in trouble and the other contact to the lead cable. If aground exists, then a sound will instantly be heard in the receiver.

The apparatus may also be used for testing out wiring installations, annunciator circuits, and for testing for grounds between wires and' the conduit system after the wires are drawninto the conduit. It is also useful for testing for broken wires or grounds between the magnets and-engine frame ofautomobiles, and can be made useful around any shop having electric apparatus to be tested. The slide 16 carries a set screw 32 for locking the same in adjusted position.

I claim:

' 1. An electric testing-apparatus comprismounted in the aforesaid groove, and acontact carried by the slide.

2. An electric testing apparatus comprising a casing having on the outside a contact and a metallic groove separated from the contact, a battery carried by the casing, said battery having one of its terminals connected to the groove, an electrically operated signal device connected to the other battery terminal and to the aforesaid contact, a slide mounted in the aforesaid groove, a contact carried by the slide, and wire attaching means carried by the first-mentioned contact and by the slide.

' 3. An electric testing apparatus comprising a casing having on the outside a contact and a metallic groove separated from the I contact, a battery carried by the casing, said battery havingone of its terminals connected to the groove, an electrically operated signal 'deviceconnected to the other battery 5' terminal and to the aforesaid contact, a. slide mounted in the aforesaid groove, a contact earned by the slide, and means for. who

' ducing an auxiliary circuit into the'battery circuit, and an electrically operated signal device in the auxiliary circuit.

In testimony whereof I afiix my signature in presence of two witnesses.

, JAMES H. CONLON. Witnesses 7 W. T. WRIGHT, C. W: WRIGHT. 

